[zamadatix]

There's no universally adopted OS standard for a lot of the stuff in the stdlib but C++ sans std::string, a large portion of things under std::ios_base, most all of concurrency (e.g. std::thread), std::filesystem, and so on would be relatively shit in comparison.

As much as possible in the stdlib should behave the same across as many targets as possible. That's about where the relevance ends in my mind.